“Compared to Wi-Fi 6, Wi-Fi 6E offers more bandwidth, providing faster connectivity speeds, lower latency, and increased capacity. Wi-Fi 6E provides 1.2GHz more spectrum in the 6GHz band, and it can support whole home gigabit coverage, multi-gigabit connectivity for venues, and it has the bandwidth for higher data streams like those used for AR and VR experiences.”
Technically, regular Wi-Fi 6 in the 5 GHz band can achieve the same 2.4 Gbps connection speed on a 2x2 antenna (I.e., iPhone laptop) as Wi-Fi 6E in the 6 GHz spectrum. This is achieved with a 160 MHz channel.
The issue in the 5 GHz band is that there are incumbents who share the radio spectrum with Wi-Fi. These incumbents use RADAR! Like weather services, airports, military etc.
Also, there’s limited 5 GHz spectrum. so Wi-Fi routers in North America that operate in the 5 GHz band must adhere to what’s called DFS if they use certain Wi-Fi channels. To achieve a 160 MHz channel with existing routers means that those channels will have to utilize a DFS channel for a portion of the channel. And if the router detects radar, it will vacate the DFS portion of the channel and hop to a different frequency. Some routers take longer than others to hop and set up shop on the new channel when radar is detected and this latency can cause real time applications like voip, teams, etc to briefly disconnect.
There’s nothing inherently better about 6 GHz vs 5 GHz in terms of connection speed. If the 5 GHz band didn’t have any radar to contend with, then our 2x2 phones and laptops would be able to connect at 2.4 Gbps. But The 6 GHz band has no such restrictions in terms of DFS and radar and there are plenty of channels available. so Wi-Fi 6E devices can connect at the full speed without having to worry about random disconnects or channel bandwidth being halved (from 160 MHz to 80 MHz) if radar is detected. Wi-Fi 7 will use up to 320 MHz for moooore speed!
The downside of the 6 GHz band however is that the signals are attenuated more easily by walls and obstructions vs the 5 GHz band so there’s a tradeoff of using 6 GHz.